Gibbs' (Mark Harmon) obsession with finding the terrorist Ari (Rudolf Martin) reaches its zenith, and is timed perfectly, as Ari is training men for an attack on Marine One with President Bush and Prime Minister Sharon on board.

The team investigates the semi-mummified corpse of a woman chained in an underground room at an abandoned military base, and deduces that the perpetrator is probably repeating the crime with another victim.